In recent years, molecular hydrogen generators, tablets, and water bottles have gained attention for providing myriad potential health benefits.
Hydrogen is a unique yet ubiquitous selective antioxidant, helping restore cellular heal, improve metabolism, boost recovery, quell inflammation, and a whole lot more.
You can add hydrogen into your daily routine by using dissolvable tablets, or special equipment like hydrogen water bottles, inhalation systems, or molecular hydrogen water machines.
While all three have their place, generators stand out as the most cost-effective & powerful long-term option. But they’re expensive and not all equal, so you want to choose carefully.
In this article, I’ll guide you through the best molecular hydrogen water & inhalation machines available now.
I’ll update this as I come across new or better ones.
Pressed for time? Jump straight to the top picks…
Overall: AquaCure AC50 Brown’s Gas Machine
Affordable: Promolife Hydrogen Water Bottle
Bottle: Echo Flask Hydrogen Water Bottle
Inhalation System: H2 Hydrogen Inhalation and Drinking System
Portable: Kencos Pocket Hydrogen Inhaler
DIY Kit: ER50 Flat-Plate Kit
What is Molecular Hydrogen?
Molecular hydrogen (H2) is a gas made of two hydrogen atoms bonded together. Colorless, odorless, and tasteless, it’s the simplest and smallest molecule.
H2 acts as a potent, selective antioxidant that neutralizes excess free radicals. So, it helps reduce oxidative stress and inflammation linked to disease. Uniquely, without blunting beneficial oxidative signaling (ie post-workout adaptations).
Here’s a guide on the benefits of molecular hydrogen therapy if you want to learn more about how it works.
Hydrogen tablets vs water bottles vs machines
I’ve personally taken hundreds—probably over a thousand—hydrogen tablets, tested a range of hydrogen water bottles, and logged more than 1,000 hours inhaling Brown’s Gas.
Having consulted with some of the world’s leading experts on therapeutic hydrogen, I learned (among other things) that the delivery method matters for your desired results.
Which one should you choose?
The right choice ultimately comes down to your goals, lifestyle, and budget as each H2 delivery method has its own strengths and trade-offs.
I personally prefer H2 water & gas generators for their long-term cost benefit & versatility. Not only do you get the benefits of hydrogen-rich water, but you get to inhale the more therapeutic Brown’s Gas.
Just 12 seconds of Brown’s Gas inhalation (from the right system) is equivalent to drinking a liter of H2 water with an average tablet. This means you get more therapeutic benefits than with H2 alone [R, R].
Not all hydrogen water generators produce Brown’s Gas (BG), though. Only those that don’t have a membrane in their electrolyzer will generate BG.
Generators with membranes will create a mixture of H2 & O2. While chemically similar, this is technically still not ‘Brown’s Gas’.
To know more about the difference between the two, watch my interview with George Wiseman.
Hydrogen water bottles are my last choice, because they rarely produce therapeutic H2 concentrations with long-term use. They also usually shock (electrolyze) the same water you drink, which likely changes the properties of the water itself.
Bottles, however, partially make up for all the downsides, shining with unparalleled convenience.
Selecting the Best Hydrogen Water Machine for You
Not all hydrogen devices are worth your time or money.
To choose the right hydrogen water machine, focus on what actually matters. These are ease of use, verified hydrogen concentration, gas flow rate, long-term durability, portability (if a priority), and most critically, safety.
Hydrogen is one of the most explosive gases, especially when mixed with oxygen. Which makes it crucial to check for robust safety measures. This is to prevent explosions.
For example, the machine must ensure that the gas mixture produced doesn’t exceed 4% hydrogen concentration when mixed with air. Exceeding this percentage increases the risk.
This list includes a variety of safe machines that generate hydrogen-rich water, produce a hydrogen gas mixture, or Brown’s Gas, or do them all.
Whether you’re new to molecular hydrogen or ready to upgrade your setup, I’m here to help you choose the best molecular hydrogen water generator for your goals.
The Best Molecular Hydrogen Water Machines Reviewed & Compared
Some machines are built for durability & power while others prioritize portability, budget, or ease of daily use.
Below is a comprehensive comparison table of the top hydrogen water generators. I’ll update it as I come across new devices or gain new information.
| Feature | Aquacure AC50 | Promolife H2 Hydrogen Inhalation & Drinking System | InhaleH2 | ER50 Flat-Plate Kit | Echo Flask Hydrogen Water Bottle | Promolife Hydrogen Water Generator | Vital Reaction Kencos Hydrogen Inhaler | Vital Reaction ZenFlow Hydrogen Water Machine |
|---|---|---|---|---|---|---|---|---|
| Machine Type ⚙️ | H2 water & Brown’s Gas generator | H2 water & mixed gas generator | Hydrogen gas generator | DIY hydrogen water generator | Smart portable hydrogen water generator | Portable hydrogen water generator | Pocket H2 & O2 gas generator | Hydrogen water generator |
| Price 💲 | $2,499 | $2,395 | Unspecified | $568 | $299 | $199 | $449 | $1,100 |
| Output 💦 | Brown’s Gas, H2 water, new water, DDW | Mixed H2 & O2 gas, H2 water | Mixed H2 & O2 gas | Brown’s Gas water | H2 water | H2 water | Mixed H2 & O2 gas | H2 water |
| Hydrogen Produced 💧 | ~49.8 mg/min | ~50.6 mg/min | Unspecified | ~49.8 mg/min | 8 ppm (8 mg/L) | 2.5-3 ppm (2.5–3mg/L) | ~0.71 mg/min | 0.2–1.5 mg/L |
| Delivery Method 💨 | Inhalation, water, topical | Inhalation, water, topical | Inhalation | Water, topical | Water | Water | Inhalation | Water |
| Portability 📦 | Countertop | Countertop | Portable | Countertop | Handheld | Portable | Handheld | Portable |
| Safety Features ⛑️ | Auto shutoff, pressure release, water level alarm, timer, anti-backfill | Timer, water level indicator | H2 output, leak, water level & temperature sensors, timer | Unspecified | Pressure release, purge valve | Auto shutoff, titanium-coated PEM | Auto shutoff, tilt sensor | Auto shutoff, |
| Certifications/ Compliance Standards 📝 | CE, CSA/UL, Australian | Unspecified | CE, UL | CE, CSA/UL, Australian | IHSA, H2 Analytics, Silver State Analytical Labs | Unspecified | Japan Home-Health Apparatus Industrial Association | Unspecified |
| Maintenance Requirements 🛠️ | Rinse with distilled water | Cleaning kit (sold separately) | Rinse with distilled water | Rinse with distilled water | Automatic cleaning function | Unspecified | Unspecified | Regular internal filter replacement & cleaning |
| Warranty and Support ✅ | Lifetime | 3 years on generator, 1 year electronic components | Included, details unspecified | Lifetime | 5-year | 1-year | 60-day | 1-year |
Before we go onto the reviews, a few notes for you…
On electrolysis. When choosing a hydrogen water generator, you want to look for “separate chamber electrolysis”. This ensures that the machine does not electrolyze the same water that you’re drinking. This keeps the pH stable, prevents the formation of ozone and toxic chlorine gas, and keeps the water in a more natural state.
On dose. More is NOT always better. Once you saturate the body with hydrogen, you simply exhale any excess. Further, there’s the question of safety when you add up to total hydrogen inhaled combined with the hydrogen exhaled.
The molecular hydrogen industry is incredibly complex. Top scientists don’t agree on ideal machine tech specs or the superiority of particular technologies.
Since I found no helpful guides online, I’ve examined a bunch of hydrogen generators and have reviewed their pros, cons, key specs, and added my personal insights. So you can choose with confidence.
Let’s dive deeper into what makes each of these hydrogen machines stand out.
AquaCure AC50
Output Type(s): Brown’s Gas, H2 water
Application(s): Drinking H2 water, inhalation, topical gas, topical water, new water, deuterium-depleted water (DDW)
Hydrogen Produced: ~49.8 mg/min
Hydrogen Infusion Time: 10-20 min
Portability: Countertop
Safety Features: Water level indicators, alarm & auto shutoff, master shutoff, anti-backfill system, tower cap pre-scrubber, lye scrubber, over-pressure safety, adjustable gas production, benign electrolyte
Certifications: CE, CSA/UL, Australian Safety Standards
Warranty: Lifetime warranty, 1-year money-back guarantee
Price: $2,499
Rating: 4.57
Pros
- High gas output
- Easy to use
- Low maintenance
- Comprehensive kit
- Amazing customer service
- Comprehensive educational resources
- Ability to imprint frequencies onto the Brown’s Gas
- Extremely durable and well made
Cons
- Significant initial investment
- Learning curve (a few hours)
- Requires distilled water
Eagle Research’s AquaCure AC50 is my top recommendation for a Brown’s Gas machine that truly performs and will last decades. The initial setup is daunting, but between the instruction manual and YouTube tutorial, I was up and running pretty fast.
It’s jampacked with features and is quite extendable.
Developed by George Wiseman, this machine is the result of over 40+ years of research & customer feedback. He is committed to making the safest & highest quality hydrogen machine available for a reasonable price.
It’s designed for inhalation, generating H2 water, topical gas and water, new water, and DDW (deuterium-depleted water). The last 2 are coming out in the near future but are already built into the machine’s design.
The AquaCure AC50 can run 24/7 without overheating, and it requires minimal maintenance. Simply rinse it with distilled water approximately every 100 hours of use (this is generally about twice per year for me).
With AquaCure, you also benefit from what George calls ‘electrically expanded water’ (ExW) within Brown’s Gas. Not all H2 generators produce ExW.
Find out why Brown’s Gas appears to have 30% greater efficacy than H2 alone in the my interview with George.
I use the AC50 most days, and you can see my in-depth AquaCure review to learn about the science, how to set up, its features & benefits, and more. I get comments and emails every single week on this system specifically.
While the initial investment is higher than some alternatives, the AquaCure AC50’s durability & comprehensive features make it the best for its overall long-term value.
Promolife H2 Hydrogen Inhalation & Drinking System
Output Type(s): Hydrogen-rich water, hydrogen & oxygen mixed gas
Application(s): Drinking H2 water, mixed gas inhalation, topical H2 water
Hydrogen Produced: ~50.6 mg/min
Hydrogen Infusion Time: 5 min for 8-16oz; 10 min for 32-34oz
Portability: Countertop
Safety Features: Minute timer, full light indicator, controlled operation timing
Certifications: Unspecified
Warranty: 3 years on generator & 1 year on components, 30-day return policy
Price: $2,395
Rating: 4.28
Pros
- 24/7 operation capability without need for a cool down cycle
- Easy maintenance
- Includes basic accessories
- Timely & responsive customer service
- Can purchase goggles for topical gas application to the eyes
- Fully assembled & made in the USA
Cons
- Cannot see water level in reservoir
- Reports of malfunctioning Full & Refill lights
- Unclear instructions in some parts of the manual
- Expensive
- No direct H2 ppm display
- Requires distilled water
- Unverified tech specs
Promolife’s H2 Hydrogen Inhalation & Drinking System is designed for H2 inhalation and production of hydrogen-rich water for drinking. It delivers 567 ml/min of hydrogen & 283 ml/min of oxygen, totaling 850 ml/min of mixed gas flow.
With high gas output and multiple application methods, it caters to a wide range of hydrogen therapy needs & preferences. You can inhale hydrogen & oxygen, drink hydrogen-rich water, or apply it topically.
To me, it looks like a white-labeled replica of the AquaCure’s inner components with a slightly different outer chassis. I’m not sure I completely trust their tech specs. They also don’t provide much detail on their website.
Promolife’s machine is straightforward to use and features a timer with adjustable settings from 1-30 minutes, or continuous operation.
Initial setup often takes around 1-1.5 hours.
If you’re on the hunt for the best hydrogen inhalation kit, Promolife’s H2 Hydrogen Inhalation & Drinking System stands out for its reliability & ease of use.
ER50 Flat-Plate Kit
Output Type(s): Brown’s Gas bubbled water
Application(s): Drinking H2 water, topical
Hydrogen Produced: ~49.8 mg/min
Hydrogen Infusion Time: 20 minutes with a 3 hour cool down
Portability: Countertop
Safety Features: Unspecified
Certifications: CE, CSA/UL, Australian Safety Standards
Warranty: Unspecified
Price: $568
Rating: 4.40
Pros
- Ideal for DIY enthusiasts
- Lower price point
- Can be modified for BG inhalation
- Designed to last for decades
Cons
- Comes unassembled
- Not as user-friendly, safe nor convenient
- Need to buy the upgrades & accessories separately
- Not designed to exceed 37 C
The ER50 Flat-Plate Kit is the option for those interested in creating their own hydrogen-rich water at home.
This system is designed primarily for making Brown’s Gas bubbled water, but also offers the flexibility to breathe the gas if you’re up for a DIY challenge. You would just need to get the add-ons.
If you enjoy tinkering and have some assembly skills, this kit can be a rewarding project.
It’s from the same makers of the AquaCure AC50 so you’re assured of topnotch customer support & comprehensive resources.
Like the AC50, the ER50 will last for decades but it cannot run continuously. It needs a cooling down cycle between uses and it’s not as safe or convenient as the AC50.
I recommend the AC50 for most people over this. But if you have a limited budget, are handy, and primarily want to generate hydrogen water, it’s worth considering.
The ER50 kit lets you affordably generate hydrogen water (only) at home, which can save you money in the long run… you just need some DIY skills to get it setup.
Echo Flask Hydrogen Water Bottle
Output Type(s): H2 water
Application(s): Drinking H2 water
Hydrogen Produced: 8 ppm (8mg/L)
Hydrogen Infusion Time: 20 minutes
Portability: Lightweight & very portable
Safety Features: Purge functionality, pressure release valve
Certifications: IHSA, H2 Analytics, Silver State Analytical Labs (for components)
Warranty: 5 years
Price: $299
Rating: 4.12
Pros
- Long hydrogen retention (up to 10 hours)
- Large serving size (12oz)
- Self-cleaning mode
- Bluetooth app with hydration tracking
- Apple/Android Health integration
- Durable, BPA-free materials
Cons
- Requires non-chlorinated water
- Uses single-chamber electrolysis
- BPA-free plastic still contains other chemicals (& microplastics)
- Battery life of only 10 hours or 7 cycles
- Expensive for a hydrogen water bottle
The Echo Flask is a technologically-advanced, smart water bottle that produces 8 ppm of molecular hydrogen in 20 minutes of infusing.
It has a futuristic design with LEDs, a touchscreen LCD, and a curved shape that fits your hand. Yet, it’s simple to use via the touchscreen or app. This brand was made popular by Gary Brecka.
Just fill the bottle with water, select a hydrogen infusion cycle, and wait for the process to complete.
Its app lets you track your hydrogen intake and set hydration goals or reminders. At just 1 lb, it’s ideal for busy, on-the-go lifestyles.
Among water bottles, it stands out for having a higher hydrogen concentration, smart features, and build quality. However, some people I know have mentioned issues with slow customer service and getting a refund.
There have been occasional reports of cloudy water or mist during operation, raising concerns about electrode degradation or impurities. However, the product design aims to minimize such risks.
The Echo Flask has received multiple certifications including FCC authorization and SGS water quality testing, ensuring compliance with safety and quality standards. More importantly, its one of few certified by the IHSA third-party.
Overall, the Echo Flask is a popular and premium high dose hydrogen water bottle that’s also certified by credible third parties.
Promolife Hydrogen Water Generator
Output Type(s): H2 water
Application(s): Drinking H2 water
Hydrogen Produced: 2.5-3 ppm (2.5–3mg/L)
Hydrogen Infusion Time: 9 min, 15 min
Portability: Portable
Safety Features: auto shutoff, Titanium coated PEM membrane
Certifications: Unspecified
Warranty: 1 year, 30-day return policy (15% restocking fee)
Price: $199
Rating: 3.61
Pros
- Very helpful customer service
- More affordable
- Easy to use & convenient
Cons
- Unclear instruction manual
- Slow charging
- Low hydrogen dose
- Battery charge lasts only 4-5 uses
The Promolife Hydrogen Water Generator is a convenient and affordable option for you to enjoy hydrogen therapy. It’s a first generation bottle, so the hydrogen dose is low.
Despite its small size, it delivers a consistent hydrogen concentration of 2.5-3 ppm, giving you hydrogen-rich water. That’s thanks to its double-walled glass reservoir, which boosts hydrogen saturation
Its portability & ease of use makes it suitable to use at home, work, gym, and even while traveling.
Reviews are mostly positive. Many praise its ease of use and report experiencing more energy, better digestion, and noticeable wellness improvements.
Some, however, find it unstable due to its height in proportion to its base diameter. So be careful that you don’t accidentally knock it over.
Regardless, the Promolife Hydrogen Water Generator is a device I’d carefully consider if budget is tight. Still, you may want to wait until you have the funds and then upgrade to the other bottles on this list.
InhaleH2
Output Type(s): Hydrogen gas mixture
Application(s): Inhalation
Hydrogen Produced: Unspecified
Hydrogen Infusion Time: Not applicable
Portability: Lightweight & portable
Safety Features: Hydrogen output % sensor, hydrogen leak sensor, water reservoir level sensor, PEM temperature sensor, cabinet tilt sensor, built-in timer
Certifications: UL, CE
Warranty: Included but details unspecified
Price: Coming soon
Rating: TBD
Pros
- Result of 7 years of R&D by 2 top hydrogen experts
- High gas flow rate
- Simple user interface
- Built-in HEPA filter also cleans room air
- Includes spare accessories
Cons
- Requires distilled water
- No user reviews yet
- Price unknown
- Minimal details available
- Unnecessarily high hydrogen dose
The InhaleH2 Hydrogen Inhalation System is a cutting-edge molecular hydrogen machine that offers a unique way to experience the benefits of hydrogen therapy.
It’s definitely the best looking device on this list.
With its inflatable reservoir and adjustable hydrogen flow rate, you can enjoy a controlled & consistent fraction of inspired hydrogen (FiH₂) tailored to your needs.
These features maintain a stable & precise FiH₂ within a safe and controlled range. So, it maximizes H2 benefits while complying with safety & regulatory standards.
Theoretically, due to the design, you may be able to use InhaleH2 for hyperoxic and hypoxic training too.
You won’t be able to buy the InhaleH2 yet, though, because it’s set to come out in the next couple of weeks. But I saw & tested it at the Health Optimization Summit a few weeks back, and it will become popular over the next 24 hours as Dr. Tyler LeBaron & Alex Tarnava do an InhaleH2 podcast tour.
Backed by 7 years of R&D, the InhaleH2 is likely going to be the absolute strongest hydrogen inhalation machine… when it comes out.
Vital Reaction Kencos Pocket Hydrogen Inhaler
Output Type(s): H2 & O2 gas mixture
Application(s): Inhalation
Hydrogen Produced: ~0.71 mg/min
Hydrogen Infusion Time: Unspecified
Portability: Very light & portable
Safety Features: Battery indicator, low liquid indicator, excessive tilt sensor, auto shutoff
Certifications: Japan Home-Health Apparatus Industrial Association
Warranty: 60-day guarantee
Price: $449
Rating: 3.35
Pros
- Rechargeable design; 2 hours to a full charge
- 30-day supply of electrolyzing ion solution included
- Simple 1-button operation
- Transparent window to observe the electrolysis process
- Odorless vapor
- Safe & healthier alternative to smoking or vaping
- Recommended by The Japan Association of the Prevention of Adult Diseases
Cons
- Doesn’t accept returns for used products unless broken or defective
- Accessories sold separately
- Battery life is 40 minutes in H2 mode and 20 min in flavor combination mode
- Requires a specific electrolyte liquid (instead of water)
The Kencos Pocket Hydrogen Inhaler is a compact molecular hydrogen generator designed to fit right in your pocket. This makes it super convenient for frequent daily use or when you’re on the go.
Plus, it’s a safe alternative to smoking or vaping, which is a nice bonus. Developed with patented Japanese technology, the Kencos provides up to 8ml/min of H2.
To me, this seems more like a marketing ploy than anything. 0.71 mg per minute is extremely low and unlikely to have much benefit. Unless you inhale for a full 10 minutes or so. Personally, I’d rather use tablets.
I’d only pick the Kencos Pocket Hydrogen Inhaler if you’re a smoker trying to replace the habit or don’t have the space or ability to use a machine or even water bottle.
Vital Reaction ZenFlow Hydrogen Water Machine
Output Type(s): H2 water
Application(s): Drinking H2 water
Hydrogen Produced: 0.2–1.5 mg/L
Hydrogen Infusion Time: In seconds (near-instant hydrogen infusion)
Portability: Countertop or undersink
Safety Features: Active carbon filter for chemical removal, safe electrolysis design, low-pressure on-demand hydration generation, auto shutoff
Certifications: Unspecified
Warranty: 365-day money back guarantee
Price: $1,100
Rating: 3.65
Pros
- Multi-stage filtration system
- Can use tap water
- Free shipping in the contiguous USA
- Can also produce ozone water for sterilization, pH range: 6.0-9.0
Cons
- Needs regular filter replacement & cleaning to maintain performance
- No explicit explosion-proof certification
The ZenFlow Hydrogen Water Machine is a sophisticated, user-friendly hydrogen water generator that combines effective filtration with rapid hydrogen infusion technology.
It even works with tap water thanks to its built-in filtration. Super convenient.
Installation and use is easy, you won’t get lost.
You can install your ZenFlow on your countertop or under the sink, just like some water filter systems.
Plus, it runs quietly, so it won’t disturb your daily routine. Just replace the internal filter regularly to keep it running well.
The issue? It doesn’t do anything particularly well. The water filter is just active carbon instead of something effective like distillation or reverse osmosis. The H2 dose is considerably lower than some of the others.
Nevertheless, it’s one of few that do filtration and infusion.
If you’re looking for one system to filter and infuse a little H2 into your water, ZenFlow Hydrogen Water Machine has you covered.
Is The Hydrogen Water Machine Verified?
Therapeutic hydrogen concentrations aren’t regulated by most health agencies globally. This means companies can make bold claims without backing them up.
In fact, the National Consumer Affairs Center in Japan (where the H2 market has been orders of magnitude larger) evaluated 28 hydrogen water brands and generators.
Their findings?
Many third-party tested hydrogen products generated so little H2 that they actually warned consumers to not waste their money.
But it’s not just Japan. The same risk exists worldwide.
While a few reputable 3rd-party organizations do certify hydrogen generators, one you’ll want to look for is the IHSA seal.
If a device lacks it or isn’t on a verified list of tested machines, think twice before buying. Either that, or it’s Brown’s Gas (they don’t certify BG).
Molecular Hydrogen Generators Questions & Answers
Here are some answers to questions you may have on H2 generators.
What is a molecular hydrogen water machine?
A molecular hydrogen water generator is a device that infuses regular water with molecular hydrogen (H2) gas, producing hydrogen-rich water. This is typically done through electrolysis, where water is split into hydrogen and oxygen, and the hydrogen gas is dissolved into the water to create a supersaturated hydrogen solution.
How does a hydrogen water machine work?
It uses electrolysis technology, often with Proton Exchange Membrane (PEM) or Solid Polymer Electrolyte (SPE), to separate hydrogen from oxygen safely and infuse the hydrogen gas into water. PEM technology prevents oxygen from mixing with hydrogen by allowing only protons to pass through the membrane, resulting in pure hydrogen-rich water.
How long does hydrogen stay in water after generation?
Hydrogen gas dissipates quickly from water due to its nature. It is recommended to drink hydrogen-rich water within an hour of generation to maximize its benefits. If left for more than two hours, it is advisable to regenerate the hydrogen in the water before drinking.
How do I use a molecular hydrogen generator effectively?
Using a molecular hydrogen generator is simple. For a hydrogen water bottle, just fill it and turn it on as directed. For inhalation devices, read the manual carefully and follow safety guidelines. Start with short sessions and increase gradually. Always use in a well-ventilated area.
The Inside Scoop on Molecular Hydrogen Water Machines
Molecular hydrogen is one of the hottest substances of the year. It has all kinds of potential health, performance, and longevity benefits.
But only if you’re getting the right dose. Safely.
Your main options are hydrogen water bottles, inhalation systems, or molecular hydrogen tablets. These high tech machines can be versatile, powerful, and quite economical over the long-term. They’re often used by advanced health optimizers and in wellness clinics.
If you’re in the market for one, hopefully this quite helps you choose the best hydrogen water machine for your needs.
Have you tried any of these devices? Or do you plan to get one? Let me know in the comments!
If you learned something new or know someone shopping for a molecular hydrogen machine, I’m sure they’d appreciate you sending them this guide.
